What Happens in Gastrulation, and What Happens When It Goes

question 11

Multiple Choice

What happens in gastrulation, and what happens when it goes wrong?

• A) Embryonic cells differentiate into the 200 types found in humans; cells don't do what they're supposed to do.
• B) Genes express differently depending on which cell type they are in; cells don't do what they're supposed to do.
• C) Embryonic cells move to locations where they grow into particular organs; organs don't develop correctly.
• D) Embryonic cells divide and replicate; the embryo doesn't grow correctly.
• E) Layers of embryonic tissue develop out of cells; organs don't develop correctly.

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